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    2006 Yamaha WR 450f Performance Mods?

    QUICK QUESTION; I've done the free mods but at WOT near the top rpm's it starts to sputter. I don't think I'm at 11,000 yet. any ideas?
  2. Just got an 06 wr45f, planned to break it in gently, but after 10 miles had to do the free ($40,) mods. (All the talk about a transformation was underrated- it's 10 times the bike it was as stock...but I'm preaching to the chior.) Anyway...when I open it up it starts to sputter at the very top of it's revs. It pulls like a beast until it's upper revs. So, as you know, it's all stock except for the mods listed is the AIS-Yamaha kit. (AIS out,gray wire mod (there's only one right?) throttle stop, pilot jet, jet needle (at 4th from either end) 2turns out on the fuel screw, airbox, pea shooter out,) Any sugesstions..I'm in phoeix, 75 degrees about 1200ft elev.